Dry Electrostatic Precipitator

BETH® Dry ELectrostatic Precipitator

The BETH® wet electrostatic precipitator complements the WEIS ENVIRONMENTAL product range with an extremely versatile dedusting system that is perfect for any process in which special dust or gas characteristics make dry separation impossible.

Principle of Function

The dust-laden process gas enters the electrostatic precipitator horizontally, and is spread to a uniform flow profile across the entire filter cross-section by means of a gas distribution system.

By means of the high voltage (70 to 110 kV) applied between the corona discharge electrodes and the collecting electrode plates, the process gas and the dust particles are electrically charged.
On the route through the electric field, the charged particles are transported to the collecting electrode plates by the electric field strength, where they agglomerate with the existing dust particles which are then knocked off by a mechanical rapping hammer system.

The rapped off dust particles drop into the filter hopper and are removed through the dust conveyor system. The purified gas leaves the filter through the gas outlet hood.

Short Description of the Technology

• Perfect gas distribution ensured by gas baffle plates and perforated plates which can be adjusted individually in case of larger gas volumes
• Horizontal passage of the gas through the filter lanes which consist of the mobile suspended collecting electrodes in plate construction with dust collection channels
• Within the lanes, corona discharge electrodes frames with high-performance electrodes made of stainless steel strips arranged in the centre
• Attachment of the corona discharge electrodes by means of screw connections with self-locking nuts
• Cleaning of the corona discharge and collecting electrodes by periodically acting motor-driven rapping systems
• High availability through large lane spacing of 400 mm or 300 mm, respectively
• Electric heating of the insulators, of the filter hopper and of the dust conveying system to prevent any material baking caused by falling short of the dew point
• Dust extraction consisting of dust transport conveyor and rotary valve
• High performance separation properties ensured by current high-voltage control systems
• Filter housing insulation, low-voltage electrical system, installation and commissioning are part of the standard scope of delivery
• Extension of the electrostatic precipitator by other plant components, such as fans, silencers, ductworks and chimneys

Advantages

• Separation of ultra-fine dust particles to meet the required legal value
• Continuous separation process
• Low pressure loss (approx. 2.5 mbar) at a high degree of separation
• Only one servicing maintenance per year due to few and slowly rotating plant components
• Low energy costs compared to filtering separators
• Volume flows of between 500 and 500,000 m³/h per filter unit
• Gas temperature up to approx. 450° Celsius
• Individual solutions possible by adaptation of the standard construction to the local conditions
• Maintenance rendered by the BETH Service Team ensures permanent availability of the filtering plant
• Of course, we also supply spare parts for all our filter systems
• Our 24-hour service is available round the clock, seven days a week, the whole year round

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